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Monotub Adhesive Filter Disks (6-Pack) Polyfil filter disks, 6-Pack, water-resistant synthetic fiber, 3M adhesive back, humidity maintenance, proper air exchange, monotubs, indoor greenhouses,  easy installation, holes up to 2.25" diameter, reusable, cleaning with Hydrogen Peroxide, circular piece of material, polypropylene, filter air, monotub cultivation, bacteria, airborne particles, proper air exchange, micron rating, 0.2 microns, adequate air flow, sterile,

Monotub Adhesive Filter Disks (6-Pack) (FD4)

5.00 stars, based on 41 reviews
A monotub filter disk is a circular piece of material, typically made of polypropylene, that is used to filter the air entering a monotub used in the cultivation of mushrooms.The filter disk is placed over the ventilation holes on the top of the...

Dope!

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Plug in play! Love it. Easy as slappin a sticker on. awesome quality

Exactly as described, fast delivery!!

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Will order again faster then evil Amazons shipping. And I actually feel good buying from them detailed instructions. And very clean packaging A1 company

Exactly as described, fast delivery!!

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Will order again faster then evil Amazons shipping. And I actually feel good buying from them detailed instructions. And very clean packaging A1 company

Florida

Excellent.

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Exactly what I needed.

fantastic quality

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I had a bit of a mishap that resulted in needing replacements for the filter disks on the tub I bought from Midwest. I tried to find cheaper DIY alternatives on Amazon but I couldn't find anything near the quality or ease of use. Polyfil is all well and good but now that I've used these I'll never go back. They're a bit pricey but they're long lasting and reusable as long as you're careful with them.